It's Finally Over... #Finally #Over.. "Shawn Powers" Yes, the week. But also the job from before the current job. :) source
the 568a and 568b was from when rj-45 and cat5(or previous) was used for phone lines. each pair was a was a phone line. so the 2 center lines are over lapped and the two lines on the outside are together
i missed it 🙁